Overview
The L4931ABD33-TR is a very low drop voltage regulator produced by STMicroelectronics. It is available in an SO-8 package and is part of the L4931 series, which is known for its very low dropout voltage and low quiescent current. This regulator is particularly suitable for low noise, low power applications, especially in battery-powered systems. It features a TTL compatible shutdown logic control function, allowing for the shutdown of parts of the board to reduce total power consumption.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Part Number | L4931ABD33-TR | |
| Package | SO-8 | |
| Grade | Industrial | |
| RoHS Compliance Grade | Ecopack2 | |
| Operating Temperature (°C) | -40 to 125 | °C |
| Output Voltage (V) (nom) | 3.3 | V |
| Output Tolerance (typ) | ±1% | |
| Output Current (A) (nom) | 0.25 | A |
| Dropout Voltage (V) | 0.4 | V |
| Quiescent Current (ON mode) | 600 µA | µA |
| Quiescent Current (OFF mode) | 50 µA | µA |
| Supply Voltage Rejection (typ) | 70 dB | dB |
| Output Bypass Capacitance | 2.2 µF | µF |
Key Features
- Very low dropout voltage (0.4 V)
- Very low quiescent current (Typ. 50 µA in OFF mode, 600 µA in ON mode)
- Output current up to 250 mA
- Logic controlled electronic shutdown
- Internal current and thermal limit
- Only 2.2 µF capacitor required for stability
- Available in ± 1 % (AB) or 2 % (C) selection at 25 °C
- Supply voltage rejection: 70 dB typ. for 5 V version
- Temperature range: from -40 to 125 °C
Applications
The L4931ABD33-TR is particularly suited for low noise, low power applications and is especially useful in battery-powered systems. It can be used in various industrial and automotive applications where low dropout voltage and low quiescent current are critical. Other potential applications include portable electronics, wireless devices, and any system requiring efficient power management.
Q & A
- What is the typical dropout voltage of the L4931ABD33-TR?
The typical dropout voltage is 0.4 V.
- What is the maximum output current of the L4931ABD33-TR?
The maximum output current is up to 250 mA.
- What is the quiescent current in ON and OFF modes?
The quiescent current is typically 600 µA in ON mode and 50 µA in OFF mode.
- What is the operating temperature range of the L4931ABD33-TR?
The operating temperature range is from -40 to 125 °C.
- What type of shutdown control does the L4931ABD33-TR have?
The device features a TTL compatible shutdown logic control function.
- What is the supply voltage rejection of the L4931ABD33-TR?
The supply voltage rejection is typically 70 dB for the 5 V version.
- What is the recommended output bypass capacitance?
The recommended output bypass capacitance is 2.2 µF.
- In what packages is the L4931 series available?
The L4931 series is available in SO-8, DPAK, and TO-92 packages.
- What are the output voltage options for the L4931 series?
The output voltage options include 3.3 V, 3.5 V, and 5 V.
- Is the L4931ABD33-TR RoHS compliant?
